# Terminology

* SmallRye - Out the box implementation of MicroProfiles, using JBoss stuff for getting up and running, basically "plugins", IBM competitor is openliberty
* MicroProfile - Eclipse MicroProfile, microservice framework composed of
    made up of (bare min)
    * JAX-RS - API for creating REST APIs
    * JSON-P - API for processing JSON
    * CDI 2.0 - Glue JAX-RS and JSON-P together dependency injection using java beans, share a class and manage its lifecycle
    * JSON-B - JSON binding (similar to jackson databind)
    * Open Tracing - standardise requests across multiple services
    * Other stuff like Metrics (prometheus), watchdogs, retry, circuit breakers etc


* Loom - Virtual threads approach to non-blocking IO (as opposed to event-loop)

* Quarkus
    * ArC - CDI (injection framework), developed from Weld
    * Command mode - terminates exits after run as opposed to normal operation (wait for systemexit or pod to be killed)

# General Notes

Quarkus built upon VERT-X for non-blocking IO, VERT-X mostly built upon netty, Vert-X provides a 80+ connectors for non-blocking IO like Kafka, mongodb, AMQP etc
Quarkus two main deploy modes - native (graalvm) and jvm, some things dont do so well natively

```java
//Mutiny async construct, onItem <- the result, onFailure <- Failed calls
Uni<String> uni
uni.onItem()
.onFailure()
```

# The Job spec

* Implement test scenarios and develop enterpirse applications for testing
* Design and develop testing frameworks in Java for various environments, like cloud, multiple operating systems, large clusters, and containers
* Provide root cause analysis for complex bugs reported by our customers and communicate the impact of these bugs to customers, developers, and support specialists
* Participate in defining testing strategies
* Analyze and prioritize the quality risks posed by Red Hat products and determine the tests required to mitigate these risks
* Serve as an internal advocate for our customers to ensure that the product goes to customers without usability or user experience issues; properly document relevant information
* Document new bugs and work with project managers and developers on prioritization and a fix
* Mentor junior team members
* Constantly learn new things and maintain an overview of current technologies like Java, MicroProfile, and Reactive programming

## Technical Job specs

* Practical experience with Java EE, MicroProfile, or Spring development
* Experience with testing in Junit or TestNG beyond unit tests
* Experience with Maven, Git, Jenkins, continuous integration, and pipelines
* Debugging and performance tuning skills
* Ability to install and maintain Red Hat Enterprise Linux (RHEL) or UNIX-like operating systems; basic administration skills of Jenkins nodes

### Main technologies to learn about

* Microprofile + SmallRye
* JUnit
* TestNG
* Jenkins, CI, piplines Blue Ocean

# The plan

- [ ] Understand technologies and terminologies
- [ ] Fire up Quarkus example
- [ ] Design an LED conversion proxy for front porch
    - [ ] Listen to MQTT broker
    - [ ] Possibly use camel k to write mqtt to file or something
    - [ ] "Translate" and passthrough to porchLED


# Refs
* [What is microprofile](https://www.youtube.com/watch?v=TDhRcKFRlq8)
* [What is SmallRye](https://www.youtube.com/watch?v=T3sh8M0t7yM)
* [CDI explained](https://www.youtube.com/watch?v=Q8jHRDu9Fbo)
* [Mutiny lib/Vert-X](https://www.youtube.com/watch?v=uTK73fpPznQ)
* [Weld](http://weld.cdi-spec.org/)